#include <stdio.h>

int swap(int a, int b)
{
	int v;
	v = a;
	a = b;
	b = v;
	return v;
}

int main(void)
{
	int a = 7;
	int b = 10;
	int c = 0;

	c = swap(a,b);

	return 1;
}

